Raws li txoj kev them fais fab, lub pawg them fais fab hauv khw muaj peev xwm muab faib ua pawg them fais fab DC, pawg them fais fab AC thiab pawg them fais fab nqa tau. Tsis tas li ntawd xwb, peb lub tuam txhab kuj muab cov khoom siv them fais fab, xws li lub adapter, rab phom ob lub taub hau, lub zog cia tau yooj yim, thiab lwm yam.